Today my father, Donald Trewartha, has been gone for 15 years. So this blog post will be a little bit nostalgic and blue. Blue because of Dad’s and my mutual love of our favorite fruit, blueberries, our favorite color, blue, and because of a little wonder that I was a witness to, both on the day my father died and today. My dad was 73 when he passed away. While all who knew him were sad to see him go, all of us hated to see him suffering from Alzheimer’s and knew he was going to Heaven. His last days…